Question 17 Which ggplot2 expression does not allow you to create subplots (or facets) from the gear grouping variable? Not yet answered Select one: Marked out of O a. ggplot (mtcars, aes (hp, mpg) ) + 1.00 geom_point ( ) + Flag facet_grid (vars (gear) ) question O b. ggplot (mtcars, aes (hp, mpg) ) + geom_point ( ) + facet_wrap ("gear", ncol = 1) O c. ggplot (mtcars, aes(hp, mpg) ) + geom_point( ) + facet_wrap (gear, ncol = 1) O d. ggplot (mtcars, aes (hp, mpg) ) + geom_point( ) + facet_wrap (vars (gear) , ncol = 1)Question 18 Below are the first 5 rows and 3 columns of the mtcars dataframe. Not yet answered mpg cyl disp hp drat wt qsec vs am gear carb Marked out of Mazda RX4 21.0 6 160 110 3.90 2. 620 16. 46 0 1 4 1.00 Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 A HA Datsun 710 22 . 8 Flag 4 108 93 3.85 2.320 18.61 1 1 4 question Hornet 4 Drive 21.4 6 258 110 3. 08 3.215 19.44 1 0 3 NHK Hornet Sportabout 18.7 8 360 175 3. 15 3. 440 17.02 0 0 3 Select the correct expression to order the data frame based on the mpg column in descending order. Select one or more: Da. mtcars [order (mpg) , : ] b. mtcars %>% arrange(desc(mpg)) c. mtcars [order (mtcars$mpg, decreasing = TRUE) , ] Id. mtcars [order (mpg, decreasing = TRUE) , ]QUESt'O\" 19 Below are two for loops to print each value in the mpg column from the mtcars dataset. Not yet answered for (i in mtcars$mpg){ Marked out of print(i) 1.00 } \\V Flag question for (i in 1:nrow(lntcars)){ print(mtcars[i,]) } Which for loop is correct? Select one: Q a. For loop 1 O b. For loop 2 O c. None O cl. Both Quesm 20 Please have a look at the while loop and evaluate the four different statements below. Not yet answered speed = 62 Marked out of while (Speed > 30) { 100 print(paste( , speed)) V Hag if (speed > 48) { question pr1nt( ) speed = speed - 11 } else { print( ) speed = speed - 6 } } Which of these statements are true? 1) If speed is set to 48 the loop will reduce the speed to 25 2) If speed is set to 60 the loop will reduce the speed to 26 3) If speed is set to 36 the loop will reduce the speed to 30 4) If speed is set to 62 the loop will reduce the speed to 28 Select one: Q a. 3 and 4 O b. 2, 3 and 4 O c. 1, 2, 3 and 4 Q d. 2 and 3